UCLA is #92 in scoring defense. When looking at yardage stats, I'm wondering if they're sufficiently skewed that the Bruins really aren't so tough against the run. Maybe they're so bad against the pass that their opponents attack their weakness, or perhaps the opponents have primarily been pass-first teams. UCLA has faced the third fewest rushing attempts this season. It's also worth noting that some teams have had no trouble running the ball against them (e.g., Rutgers).
Yes, the Hawks should pass more this game, but not necessarily because they won't be able to run.